I've been rattling in Wisconsin for some years now. Until this year, I've had little success. However, this year, I acquired some larger antlers, and, with the learned information from hearing not one, but two very incredible fights of mature bucks in the past two years, feel I'm better prepared to the task.
I've had reasonable success rattling this year throughout the season, although they've been 1.5-2.5 year olds. I called in four bucks in one sequence one evening about four weeks ago.